This thesis explores how the treatment of brass in anime openings reflects gender bias across various areas of Japanese Popular Culture including in the history of shoujo manga, Japanese Idols and the kawaii movement. By highlighting the ways in which the shoujo genre is often discriminated against in favour of its male-dominated counterparts, the use of brass in shoujo anime openings is being utilised as a tool to represent how anime is being marketed to audiences through a binary societal view of what is feminine and what is masculine.